LINEARISATION AND TRANSFORMATION OF THE DIFFERENTIAL EQUATIONS OF AN AUTOMATIC REGULATION SYSTEM

Author(s):  
E.P. POPOV
Author(s):  
А. Yu. Izmaylov ◽  
Ya. P. Lobachevskiy ◽  
V. К. Khoroshenkov ◽  
N. Т. Goncharov ◽  
S. E. Lonin ◽  
...  

The introduction of information and digital technologies that support and support all technological processes in the field is an urgent need for the development and implementation of such technology. An organisationally complex and financially intensive project is necessary because of the wide variety of economic entities that differ in the size of production, forms of ownership and socio-economic conditions of production. Automated information control system for mobile units agricultural enterprise provides those-Niko-economic performance, optimum capacity utilization through the use of timely and reliable information on technology. Machine and tractor aggregates are appertained as control objects with variable structure, which is explained by possibility of the system formation from tractor or field machines mobile units with various purposes: tillable, cultivatable, sowing, harvesting and etc. This MTA feature was determined creation of digital control systems of two groups of automatic control and management of the basic energy and operational parameters: tractors, machines and vehicles as part of MTA. To the first group are appertained the automatic control system of tractor motor component loading, motion speed, frictional sliding. To the second group – automatic regulation system of operating depth, seed rate, treatment of liquid combined fertilizers and crop protection agents, filling and driving of various MTA. Novelty of researches consists in methodology of the organization of the centralized control and management of various technological processes at carrying out field works.


2013 ◽  
Vol 2 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Volodymyr Ivakhno ◽  
Volodymyr V. Zamaruiev ◽  
Olga Ilina

AbstractThe conventional tools for the system level simulation of the switch-mode power converters (for example, MATLAB/SIMILINK) allow simulating the behavior of a power converter jointly operating with the control system in a closed automatic regulation system. This simulation tools either represent semiconductor devices as ideal switches or implement the simplest models based on volt-ampere characteristics of standard types of semiconductor devices for conducting loss estimation. This fact makes direct calculation of dynamic power losses in the semiconductor devices impossible. The MATLAB/SIMILINK subsystem that calculates the average power dissipated in the power switch during turn-on and turn-off transition is proposed in this paper. The represented approach used in the subsystem estimates by the means of MATLAB/SIMILINK the values of turn-on and turn-off energies at power switch commutation instances on the base of switching current and voltage measurements and the values of commutation energies given in datasheet on power switch. The simulation results of step-down converter with IGBT and proposed subsystem in MATLAB/SIMULINK were compared with the calculation results obtained in Semisel


Author(s):  
Kristína Gerulová ◽  
Martin Neštický ◽  
Eva Buranská ◽  
Roman Ružarovský

Abstract A real-time monitoring and regulation system for metalworking fluids is being constructed to be installed in the Centre of excellence of 5-axis machining at the Faculty of Materials Science and Technology in Trnava. The article is focused on the description of the main components of the monitoring system and preliminary characterization of the software utilized in the regulation. The monitoring system will contain four probes to record real time values of pH, conductivity, temperature and concentration. After processing of recorded data by the LabVIEW software, an adjustment of the Metalworking fluid in the reservoir tank will be realized by the regulation part of the proposed system to optimum properties of the fluid, by adding water or concentrate. The designed device will provide an easy system which will control the quality of used metalworking fluid during its lifetime and maintain it on its optimum condition without human operator’s assistance.


1999 ◽  
Vol 4 (1) ◽  
pp. 18-25
Author(s):  
I. Basov ◽  
M. Meilūnas ◽  
D. Švitra

We present the system of two nonlinear difference‐differential equations with lag which is a mathematical model of self‐regulation of sugar level in blood. We analyze the pathological case, i.e. describe the concrete patients glycemia self‐regulation system and diet. The model helps to determine the dosage and tactics of the traditional insulinotherapy practicing discrete inputs of insulin into the organism with the help of injections.


Author(s):  
Gabriela Moise

This paper aims at presenting the systems theory-based approach to the learning (instructional) process. Such as approach is necessary, if one takes into consideration the the complex and holistic nature of the learning process. The presented modeling is based on the definition of an automatic regulation system and artificial intelligence techniques. For this purpose, an Intelligent Instructional System (IIS) is defined using the concepts: inputs, outputs, perturbations factors, regulation, feedback and AI learning techniques. The contextual environment of learning plays the major role in this system and it establishes the perturbation factors. The regulation consists in AI learning techniques, so the IIS is a flexible and adaptive system. The process’ behaviour is described using pseudo-boolean and linear equations. This kind of approach enables solving the problems of the complexity and uncertainty of the learning (instructional) systems and, particularly, those of the e-learning (online and offline). Applications of the proposed approach may be found in e-learning courses for Mathematics, Computing, Architecture, Archaeology, Cultural Heritage, etc.


Author(s):  
L.G. Tugashova ◽  
◽  
A.V. Zatonskiy ◽  

This article provides an overview of the methods of managing the primary petroleum refining. To improve separation efficiency was proposed to stabilize the reflux ratio in the rectifying column. Purpose of work. To develop a system for automatic regulation of the reflux ratio of diesel fuel sec-tions in an atmospheric column of the refinery oil. To study the operating modes of an atmospheric column with the participation of the obtained automatic control system. Materials and methods. The article presented the features of the oil rectification process at the atmospheric unit of a small capacity refinery. The features of heat dissipation with intermediate circulation flash compared to a large-capacity unit will be shown in this article. The parameters of the facility were selected and divided into groups. A dynamic model of the section of shell-and-tube heat exchangers for heating oil with diesel fuel at a low-power refinery unit in the form of differential equations of heat balance has been developed to achieve the goal set work. An electrode dehydrator material balance equation has been compiled to find desalted oil consumption and saltwater consumption. The dependence of the reflux ratio of diesel fuel sections of the atmospheric column on the inlet and outlet temperatures of the atmospheric column circulation flash, the acute fractionation con-sumption, circulation flash, and oil fraction selection was obtained. The resulting model of the facili-ty consists of two parts: the linear part of the electric dehydrator and heat exchanger section, which determines the temperatures of the coolants, and the nonlinear output part, which determines the re-flux ratio depending on technological parameters. The proposed model makes it possible to investi-gate the effect of disturbances on the controlled parameters. The MATLAB/Simulink software prod-uct has been chosen as a tool to implement the model. A system of automatic regulation of the re-flux ratio in MATLAB/Simulink has been built with the participation of the developed model of the study object. Conclusion. The results of modeling a system for automatic regulation of the reflux ratio of diesel fuel sections in the atmospheric column of a low-power refinery unit has been ob-tained, taking into account the peculiarities of the process under disturbance conditions.


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